#!/usr/bin/env python3
'''
some useful wx widgets

Andrew Tridgell
June 2012
'''

from MAVProxy.modules.lib.wx_loader import wx
import cv2
import numpy as np
import warnings

class ImagePanel(wx.Panel):
    '''a resizable panel containing an image'''
    def __init__(self, parent, img):
        wx.Panel.__init__(self, parent, -1, size=(1, 1))
        self.SetBackgroundStyle(wx.BG_STYLE_CUSTOM)
        self.set_image(img)
        self.Bind(wx.EVT_PAINT, self.on_paint)

    def on_paint(self, event):
        '''repaint the image'''
        dc = wx.AutoBufferedPaintDC(self)
        dc.DrawBitmap(self._bmp, 0, 0)

    def set_image(self, img):
        '''set the image to be displayed'''
        with warnings.catch_warnings():
            warnings.simplefilter('ignore')
            if hasattr(img, 'shape'):
                (width, height) = (img.shape[1], img.shape[0])
                self._bmp = wx.BitmapFromBuffer(width, height, np.uint8(img)) # http://stackoverflow.com/a/16866833/2559632
            elif hasattr(img, 'GetHeight'):
                self._bmp = wx.BitmapFromImage(img)
            else:
                print("Unsupported image type: %s" % type(img))
                return
            self.SetMinSize((self._bmp.GetWidth(), self._bmp.GetHeight()))
